Bragg gratings in silicon-on-insulator waveguides by focused ion beam milling
We report Bragg grating structures fabricated by focused ion beam milling in optical waveguides, and demonstrate that they can be used as a powerful diagnostic of optical modes in very high index waveguides. We show that higher-order lossy modes, which can be present in large numbers even in single-moded silicon-on-insulator waveguides, can dramatically affect the optical transmission spectra of Bragg gratings in these waveguides, even though these modes are normally not observable. Our results...[Show more]
|Collections||ANU Research Publications|
|Source:||Applied Physics Letters|
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